Oil-based ink for electrostatic type ink jet process

摘要

An oil-based ink for an electrostatic ink jet process, comprising: a nonaqueous carrier liquid having an electric resistance of 109 OMEGAcm or more and a dielectric constant of 3.5 or less; and chargeable resin particles dispersed in the nonaqueous carrier liquid, wherein the resin particles dispersed are copolymer resin particles obtained by a polymerization granulation of a solution containing: at least one monofunctional monomer (A) which is soluble in a nonaqueous solvent and becomes insoluble in the nonaqueous solvent by polymerization; at least one monofunctional monomer (B) having an amino group represented by formula (I) shown below and being copolymerizable with the monomer (A) and at least one resin for dispersion stabilization (P) comprising a component represented by formula (II) shown below:The symbols in the above formulae are defined in the specification.